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Ending the Fossil Fuel Addiction: What will it Take? Dr. Kyle Forinash Professor of Physics School of Natural Sciences Indiana University Southeast New Albany, IN,USA Now!!
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US: 300 metric tons of fossil fuel per second!
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How Much Oil Is There? (Should we worry?)
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Definitions. Resource or ‘oil in place’: Estimate of what is there. Proven Reserve: 90% confidence it can be extracted with given technology (primary + secondary + tertiary methods). Ultimately Recoverable: Proven + extracted. Unproven Reserve: 10-50% confidence. Shale Oil: Compounds in shale that can be cooked into oil. Tight oil: Oil extracted by fracking.
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“Huge Discoveries of Oil!” ? (Proven Reserve) 2012 India – 5.7 Bbl 2011 Gulf of Mexico – 0.5 Bbl 2007 Brazil – 8 Bbl 2006 Gulf of Mexico – 15 Bbl North Slope Alaska – 11.8 Bbl Eagle Ford, Texas – 4 Bbl US Annual Consumption – 7 Bbl
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In 1956 M. King Hubbert predicted that US oil production would peak in the early 1970s. Excerpt from Hubbert's original paper: Actual:
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Sample Hubbert Results (world). ResourcePeak YearRecoverable Resource, Quad Conventional Oil200811264 Natural Gas + Fracking20259307 Petroleum + Shale Oil203321935 Coal206022696 Uranium21135080000
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The Earth is Warming. Alaska: Face of Glacier in 1951 Alaska: Face of Glacier in 1951 Alaska: Face of Glacier in 2001 Alaska: Face of Glacier in 2001
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Transportation Accounts for 27% of the Energy Used in the U.S.
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74% heat loss 4% idling loss 3% acceleration 3% transmission loss 6% rolling friction 7% air drag 3% accessories Where Does Your $1 of Gas Go?
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Technology of the Past 20 Years Has Been Used to Make Cars 9% Bigger with 40% More HP.
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Gasoline Will be Hard to Replace. FuelEnergy per Weight (MJ/kg) Hydrogen114 (10 liquid; 5 compressed gas) Gasoline48 Plant Oil (Bio-Diesel)38 Ethanol28 Common Coal22 Natural Gas (STP)20 Air Dried Wood15 Potatoes4 Carbon Fiber Flywheel0.8 Fruits and Vegetables0.6 - 1.8 Lithium Batteries (at 400C)0.2 Lead Batteries0.1
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Problems with Hydrogen As a Car Fuel. H 2 is not a fuel (requires energy to make). 40% energy loss to make H 2 from natural gas. 80% energy loss to make H 2 from grid electricity. H 2 is more difficult to transport and more dangerous than diesel, gasoline, propane or natural gas. (Transportation of propane is highly restricted.) H 2 will require a new distribution grid (compared to existing electric grid).
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Plant Oil as a Fuel? US transportation consumption (2004): 27.8 Quad Energy production, all arable land in the US cultivated with soybeans (bio-diesel): 25.6 Quad
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The 2 nd Law of Thermodynamics Limits Thermal Engine Efficiencies. Process Conversion Type Efficiency Large Electric GeneratorMechanical to Electrical98-99% Large Electric MotorElectrical to Mechanical90-97% Home Gas FurnaceChemical to Thermal90-96% Small Electric MotorElectrical to Mechanical60-75% Fuel CellChemical to Electrical 50-60% Large Steam TurbineThermal to Mechanical40-45% Diesel EngineThermal to Mechanical30-35% Gasoline EngineThermal to Mechanical 15-25% Florescent LightsElectrical to Radiative15-25% Incandescent LightsElectrical to Radiative 2-5% Plant PhotosynthesisRadiative to Chemical1%
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How Many New Power Plants to Convert to Electric Vehicles? Annual US transportation needs (primary energy): 27.8 Quad. Assuming a 50% efficient electric car we need 10.8 Quad of primary energy to replace our 20% efficient gasoline cars. For a 1,000 MW power plant (coal, gas or nuclear) operating at 80% capacity this is 450 new plants (current US total is 950 plants). For a 2MW windmill operating at 40% capacity this is about 452,000 windmills. For 20% efficient solar panels this is 21,400 km 2 (the size of New Hampshire).
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What about Renewables?
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Available Renewable Energy (world). SourceEstimated Total Energy (Quad) Estimated Recoverable Current Use (Quad) Solar (over land)8.1x10 5 30,0002.2 Thermal 0.2 PV Wind (over land)1.1x10 4 200 to 18000.4 Biomass * 2.8x10 3 12 to 120021 Hydroelectric300 to 90040 to 602.7 Tidal90100.01 Wave6015 to 300.01 Geothermal1.3x10 4 300.5 (*food crops, grassy and woody plants, residues from agriculture or forestry, organic component of municipal and industrial wastes, fumes from landfills)
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To supply all energy used in 2005, with solar * or wind †. ( * 20% efficiency solar cell, 50% storage and transmission loss.) ( † 2MW windmill, 40% efficiency) CountryEnergy Use (Quad)% Area SolarNumber of Windmills Argentina2.70.2113,000 China46.60.91,950,000 Denmark0.93.737,700 Egypt2.80.4117,200 France11.23.7468,700 Ghana0.1 4200 Japan22.410.8937,500 Russia17.10.3715,700 UK9.87.8410,100 US98.81.94,101,500
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Dollar per MWh for Electricity. SourceSize (MW) Capacity Factor % Capital Cost Fixed O&M Fuel Cost Transmission Cost Total Cost Coal60085573.7233.587 Gas87201.6553.880 Nuclear135090821094105 Biomass/Landf ill 8083649254102 Geothermal5090772205104 Hydropower50040-605770569 Wind, onshore Wind, offshore 50 36 33 73 171 10 29 0000 8989 91 210 Solar Thermal1003122021010.6252 Photovoltaic5223426.2013362 Conservation-60
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Won’t Conservation Hurt? Two Examples: Refrigerators since 1970: Increase in efficiency by 75% Drop in price by 60% Increase in volume by 20% on average European and Japanese cars compete well with American cars but use less gas.
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Nuclear Choices. Death and cancer rates much lower for nuclear than coal, oil or natural gas use per kWh. France gets ~75% of electricity from nuclear (19.6% for the US, 17% for world in 2003). 'Inherently safe' reactors (pebble bed, modular design, few moving parts, smaller). The radioactive waste problem (vitrification, fuel recycling). Fusion: First reactor by 2050?
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Summary Use of oil is going to decline; coal & natural gas will last a while longer (but CO 2 is a problem). Hydrogen, plant fuel are probably not good ideas. Conservation should play a big role. Use of renewables should be increased: wind, biomass, hydroelectric, and especially solar. Use of electric power should be increased where possible because of higher efficiency. Nuclear power may be a necessary evil. New sources? Methane hydrates? Conclusion: There is no silver bullet.
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Kyle Forinash Indiana University Southeast homepages.ius.edu/kforina s/Forinash.html Island Press, April 2010
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